"Very high rainfall is making life a bit more difficult and uncomfortable for the communities in camps," he said.

"We're trying now to move into the phase we've just re-established a humanitarian action plan for the next 60 days with the development partners and the government ministries and NGOs."

Mr Wickham said the Ministry of Health together with the Solomon Islands Red Cross and other partners were monitoring health and sanitation closely.

But he said the wider community response in the Solomon Islands had been "overwhelming" since the disaster.

"There are a range of support initiatives being carried here in the capital Honiara, and also in other parts of the country, to support the Temotu people, on Santa Cruz and it's been quite overwhelming."